Spin des niveaux à 0,46 et 0,67 MeV du 34Cl

L'étude de la réaction 32S(3He, pγ) 3Cl a été réalisée à l'aide d'un faisceau 3He++ aux énergies 9, 9,5 et 10 MeV. Les coïncidences pγ ont été effectuées entre protons détectés à 0° et rayonnements γ, conformément à la méthode II de corrélation angulaire de Litherland et Ferguson. L'exploitation des corrélations des groupes de protons menant aux deuxième et troisième niveaux excités du 34CI avec les rayonnements γ correspondants, détermine sans ambiguïté J = 1 pour les niveaux à 0,46 et 0,67 MeV de ce noyau. Ces résultats confirment les prévisions théoriques déduites du modèle en couches avec interaction à deux particules modifiée

Étude d'états excités de 22Ne a l'aide des résonances de capture radiative de particules alpha par 18O entre 1,6 et 5,0 MeV d'énergie incidente

La courbe d'excitation du rayonnement γ de 350 keV issu de la réaction 18O(α, nγ) 21Ne a été mesurée entre 1,6 et 5 MeV. Six nouvelles résonances ont été observées correspondant aux niveaux du 22Ne : Ex = 11,199 MeV (Eα = 1,873 MeV ; Γt = 7 keV) ; 11,271 (1,961 ; 7) ; 11,431 (2,156 ; 47) ; 11,519 (2,263 ; 6) ; 11,577 (2,335 ; 16) ; 11,745 (2,540 ; 41). Nous avons relevé les spectres de désexcitation par rayonnement γ de tous les niveaux mis en évidence et mesuré les distributions angulaires des rayonnements γ de la réaction 18O(α, γ) 22Ne chaque fois que l'intensité de transition le permettait. En fait seules trois résonances déjà observées se trouvaient dans ce cas. Pour le niveau Ex = 11,462 MeV (2,194 ; 9) la distribution angulaire a permis de fixer Jπ = 1 -. Pour les niveaux Ex = 11,682 MeV (2,463 ; 8) et Ex = 11,751 MeV (2,547 ; 8) les valeurs respectives J π = 2+ et Jπ = 1- ont été confirmées. Des rapports d'embranchement (γ0/γ1) ont pu être déterminés pour ces trois niveaux ainsi que les coefficients de mélange de multipolarité des transitions γ1. Des limites supérieures des intensités de transition ωγ pour les transitions γ0 + γ 1 sont données pour les autres niveaux

Thermodynamic assessment of the variation of the surface areas of two synthetic swelling clays during adsorption of water

International audienceTwo synthetic smectites (montmorillonite and beidellite) are studied by a water adsorption technique in order to assess their specific surface areas under atmospheric conditions. A route recently proposed for extracting the thermodynamic data from experimental adsorption isotherms is used. The variation of the specific surface area during water adsorption is obtained, which can be linked to the enlargement of the interlayer space determined using X-ray diffraction. This variation is compared to an idealized specific surface area obtained from TEM and X-ray measurements in agreement with crystallographic models. All these results are also compared with those obtained previously for a natural montmorillonite. A simple view of swelling is proposed

Development of a self-scan to evaluate and improve person-centered care in nursing homes:A Delphi study

Background and objective: Person centered care (PCC) has become the gold standard for providing care in nursing homes (NHs). Therefore, it is important for healthcare professionals in NHs to learn PCC-skills and to be supported to learn about- and improve the quality of PCC they provide. At this moment an instrument to support healthcare professionals in NHs to monitor and evaluate PCC is limited. The aim of the study was to develop a self-evaluation tool that provides healthcare professionals in NHs insight into the extent to which they provide PCC to residents, so that they can learn and further improve their current ways of working in a person-centered way. Methods: A three-round Delphi study with an expert panel (n = 25) in the domains of PCC, quality of NH care and education of caring staff. Findings were validated by residents and relatives during semi-structured interviews. Thematic analysis and descriptive statistics were used to analyze the data. Results: In the first round the experts did not provide measuring instruments, but we identified 18 key aspects of PCC. In the second round, three clusters were identified, and a scale was added, to enable assessment. In the third round, we deduplicated, restructured and used more clear language. This led to 14 key aspects of PCC, 24 measures, grouped into five clusters: knowing the resident, establishing relationship, a respectful approach, making decisions jointly and personal development. The result is a PCC self-scan for healthcare professionals in NHs. Residents and relatives, agreed with all aspects and stated that no aspects were missing. Conclusions: In this study we developed an accessible self-report learning tool for healthcare professionals that makes it possible to evaluate and improve their PCC-skills and improve the quality of PCC in NHs

How do practically trained (student) caregivers in nursing homes learn?:A scoping review

Background and objective: Practically trained (student) caregivers (further: caregivers) make up the majority of care staff in nursing homes (NHs). To keep up with the fast-changing healthcare environment and ensure a high quality of care, it is important to know how to stimulate continuous work-based learning (WBL) among this group. The purpose of the study was to systematically study the scientific literature published to date on (1) how caregivers learn in NHs and (2) what facilitates or impedes their learning. Methods: A scoping review was carried out, systematically searching six scientific databases. A total of 35 studies published from January 2009 to February 2021 were included. Study characteristics, learning mechanisms, facilitators, and barriers to learning were extracted and synthesized. Results: None of the studies specifically focused on how caregivers learn. Yet, we identified various learning mechanisms, and found that learning by theory or supervision was most frequently engaged in. Most learning mechanisms used among the groups in the included studies were planned and formal and developed and initiated by others out of the context. Three main themes were identified among the facilitators and barriers of WBL: individual learning, collective learning, and resources for learning. An interdependency between (sub)themes was found. Conclusions: The way caregivers in NHs learn is understudied. Moreover, both their informal learning and the support they receive to be(come) active learners has been overlooked. As WBL provides caregivers with opportunities to learn within a real-life setting, we suggest more research on informal learning mechanisms

Quantum Conductance in Silver Nanowires: correlation between atomic structure and transport properties

We have analyzed the atomic arrangements and quantum conductance of silver nanowires generated by mechanical elongation. The surface properties of Ag induce unexpected structural properties, as for example, predominance of high aspect ratio rod-like wires. The structural behavior was used to understand the Ag quantum conductance data and the proposed correlation was confirmed by means of theoretical calculations. These results emphasize that the conductance of metal point contacts is determined by the preferred atomic structures and, that atomistic descriptions are essential to interpret the quantum transport behavior of metal nanostructures.Comment: 4 pages, 4 figure